Ukraine says it has carried out drone attacks on key Russian energy infrastructure, targeting oil refineries and military sites in response to recent deadly Russian assaults on Ukrainian cities.

According to Ukraine’s military, two major oil refineries—Novokuibyshevsk in the Samara region and Ryazan southeast of Moscow—were struck in coordinated drone operations. Additional targets included a fuel depot in Voronezh and an electronics facility in Penza, which Ukrainian officials described as part of Russia’s military supply chain.

In a separate operation, Ukrainian long-range drones reportedly hit a military airbase in Russia’s Krasnodar region, damaging storage and launch sites for Shahed drones.

While Russia’s Rosneft, which operates both targeted refineries, has not issued a response, regional Russian officials acknowledged damage from drone debris. Samara’s governor confirmed an industrial site had been hit, resulting in one death, while Ryazan authorities said a drone had crashed on a facility without giving further details. In total, Russian officials reported at least three deaths.

These strikes follow a major Russian missile and drone attack on Kyiv last Thursday, which killed at least 31 people and injured more than 150, including children, in one of the most devastating attacks on the capital since the war began.

The Ryazan refinery is among Russia’s largest, capable of processing about 340,000 barrels of crude per day, while the Novokuibyshevsk plant handles around 177,000 barrels. Combined, they represent under 10% of the country’s total refining capacity.

Ukraine’s military efforts appear aimed at disrupting Russia’s ability to supply fuel to the front lines and reduce its oil revenue amid the ongoing war, now approaching its fourth year.

Additionally, a Ukrainian military source claimed that explosions damaged a gas pipeline from Turkmenistan to Russia’s Volgograd region, which allegedly supports Russian military plants. This claim has not been independently confirmed.